56d194d377
For most I/O stream implementations the serial communication specific functions are meaningless. Implementing them as no-ops allows the dive computer backends the call the I/O stream functions unconditionally. However, implementing the no-op with a dummy function returning DC_STATUS_SUCCESS, does not only add some (small) overhead at runtime, but also requires many such functions. This is inconvenient and the same result can easily be obtained by using a NULL pointer instead. The consequence is that the logic is reversed now. To obtain the previous behaviour of returning the DC_STATUS_UNSUPPORTED error code again, you'll need to implement a dummy function. But that's fine because it's the less common case.
123 lines
3.1 KiB
C
123 lines
3.1 KiB
C
/*
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* libdivecomputer
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*
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* Copyright (C) 2017 Jef Driesen
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#ifndef DC_SOCKET_H
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#define DC_SOCKET_H
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#ifdef _WIN32
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#define NOGDI
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#include <winsock2.h>
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#include <windows.h>
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#else
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#include <errno.h> // errno
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#include <unistd.h> // close
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#include <sys/types.h> // socket, getsockopt
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#include <sys/socket.h> // socket, getsockopt
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#include <sys/select.h> // select
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#include <sys/ioctl.h> // ioctl
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#include <sys/time.h>
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#endif
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#include <libdivecomputer/common.h>
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#include <libdivecomputer/context.h>
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#include "iostream-private.h"
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#ifdef _WIN32
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typedef SOCKET s_socket_t;
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typedef int s_ssize_t;
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typedef DWORD s_errcode_t;
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typedef int s_socklen_t;
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#define S_ERRNO WSAGetLastError ()
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#define S_EINTR WSAEINTR
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#define S_EAGAIN WSAEWOULDBLOCK
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#define S_ENOMEM WSA_NOT_ENOUGH_MEMORY
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#define S_EINVAL WSAEINVAL
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#define S_EACCES WSAEACCES
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#define S_EAFNOSUPPORT WSAEAFNOSUPPORT
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#define S_INVALID INVALID_SOCKET
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#define S_IOCTL ioctlsocket
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#define S_CLOSE closesocket
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#else
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typedef int s_socket_t;
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typedef ssize_t s_ssize_t;
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typedef int s_errcode_t;
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typedef socklen_t s_socklen_t;
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#define S_ERRNO errno
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#define S_EINTR EINTR
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#define S_EAGAIN EAGAIN
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#define S_ENOMEM ENOMEM
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#define S_EINVAL EINVAL
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#define S_EACCES EACCES
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#define S_EAFNOSUPPORT EAFNOSUPPORT
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#define S_INVALID -1
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#define S_IOCTL ioctl
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#define S_CLOSE close
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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typedef struct dc_socket_t {
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dc_iostream_t base;
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s_socket_t fd;
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int timeout;
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} dc_socket_t;
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dc_status_t
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dc_socket_syserror (s_errcode_t errcode);
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dc_status_t
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dc_socket_init (dc_context_t *context);
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dc_status_t
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dc_socket_exit (dc_context_t *context);
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dc_status_t
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dc_socket_open (dc_iostream_t *iostream, int family, int type, int protocol);
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dc_status_t
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dc_socket_close (dc_iostream_t *iostream);
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dc_status_t
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dc_socket_connect (dc_iostream_t *iostream, const struct sockaddr *addr, s_socklen_t addrlen);
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dc_status_t
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dc_socket_set_timeout (dc_iostream_t *iostream, int timeout);
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dc_status_t
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dc_socket_get_available (dc_iostream_t *iostream, size_t *value);
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dc_status_t
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dc_socket_read (dc_iostream_t *iostream, void *data, size_t size, size_t *actual);
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dc_status_t
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dc_socket_write (dc_iostream_t *iostream, const void *data, size_t size, size_t *actual);
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dc_status_t
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dc_socket_close (dc_iostream_t *iostream);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* DC_SOCKET_H */
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